Cupronickel high-temperature fiber drawing lubricating grease and method for producing the same

Abstract

The invention discloses a grease lubricant for the cupronickel high-temperature drawing wire and a preparation method, which is characterized in that the product is made by the complex formulation of 0.5% to 20% ultrafine graphite powder or ultrafine silica, 0.5% to 15% polyethylene glycol and / or trioctyl methyl bromide, 0.5% to 10% Span-80 and / or Tween-20, 0.01% to 5% antioxidant, 0.001% to 0.8%smoothing agent, 5% to 40% machine oil or gear oil and balance of lithium-based complex grease saponified in situ. The product of the invention has the advantages that friction coefficient between the cupronickel drawing wire and the die is reduced; service life of the die is prolonged; the cupronickel wire of 1.5 to 2.0 tons can be drawn by a new die; surface quality of the cupronickel wire is improved; the wire material surface has no defects such as tear, peeling or scuffing; tensile failure times are decreased; wire drawing speed is increased to 50 to 60 meters per minute; productivity ofthe cupronickel wire is improved to 1.7 tons per hour; and the product has good performance, stable quality, simple preparation technology and important application value in the high-temperature lubricating fields such as metallurgy and material.

Description

technical field [0001] The invention relates to the field of high temperature lubricating grease, in particular to a kind of lubricating grease for continuous multi-mode high temperature and high speed drawing of cupronickel alloy and a preparation process thereof. Background technique [0002] Cupronickel is an alloy of copper, cobalt and nickel. Copper and nickel can dissolve in each other infinitely to form a continuous solid solution. Adding nickel to copper can significantly improve corrosion resistance, strength, hardness, resistance, and reduce the temperature coefficient of resistivity. Among copper alloys, cupronickel is widely used in shipbuilding, petroleum, chemical industry, electric power, precision instruments, medical equipment and other departments as corrosion-resistant structural parts because of its excellent corrosion resistance and easy plastic processing and welding; some cupronickel also has special Electrical properties, resistance elements, thermoco...

AI Technical Summary

Problems solved by technology

At present, the copper-nickel high-temperature drawing lubricants used in wire processing plants are mostly calcium-composite greases, and their lubricating effects are generally poor. When the temperature exceeds 200°C, the grease will flow, carbonize and even scale, making the lubricating effect worse. Ultimately, the life of the mold is low, the copper wire is easily broken, and the surface of the wire has more defects

[0003] Chinese patent (CN 1132920C) discloses the use of synthetic oil polyether-454, molybdenum disulfide powder, antimony sulfide antimony and silicon oil to prepare a kind of grease as raw material, which can play a good role in high temperature lubrication, but in the grease Antimony sulfide and sulfur in molybdenum disulfide tend to tribochemically react with copper in cupronickel during high-temperature drawing to form black copper sulfide and cuprous sulfide, which seriously affects the surface quality of copper wire, and the exuded sulfide Strictly restricted by the national environmental protection department; Chinese patent (CN 1017346B) discloses a calcium-based grease as a high-speed wire drawing lubricant, but it contains sodium nitrite, which has been banned from use and has carcinogenic effects, and affects the copper alloy surface. mass molybdenum disulfide

U.S. Patent (USP2,468,099) discloses the saponification of oleic acid, hydrogenated fish oil, and acrylic acid in mineral oil and sodium hydroxide to prepare high-temperature grease. , it is easy to be oxidized at high temperature, so that the service life of the grease is greatly shortened

U.S. Patent (USP 4,298,481) discloses adopting 80~94% hydrogenated dimer carboxylic acid, 0.2~6% additive, 5~20% thickening agent has prepared a kind of lipophilic surface modified high-temperature lubricant, wherein additive Parts mainly include antioxidants, antirust agents, metal passivators, extreme pressure agents, etc., but most of the additives used in this invention need to be synthesized by themselves, which greatly increases the manufacturing cost of lubricating grease